feat: [AXM-755] save external files and fonts to offline block content #786

Job	Run time
collect-and-verify	4m 43s
lms-1(py=3.11,dj=pinned,mongo=7.0)	14m 32s
lms-2(py=3.11,dj=pinned,mongo=7.0)	14m 38s
lms-3(py=3.11,dj=pinned,mongo=7.0)	17m 59s
lms-4(py=3.11,dj=pinned,mongo=7.0)	17m 53s
lms-5(py=3.11,dj=pinned,mongo=7.0)	13m 47s
lms-6(py=3.11,dj=pinned,mongo=7.0)	15m 41s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	14m 17s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	13m 42s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	10m 39s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 22s
cms-1(py=3.11,dj=pinned,mongo=7.0)	5m 53s
cms-2(py=3.11,dj=pinned,mongo=7.0)	19m 57s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	12m 30s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 43s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 32s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	7m 56s
Unit tests successful	4s
compile-warnings-report	1s
coverage	1s
	3h 27m 50s

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